Overview: Dielectric Broadband Mirrors provide an optimized performance at broad wavelength range and wide angle of incidence (AOI). These multilayer coating stacks helps to achieve the highest possible reflectivity at broad spectrum region at normal to 45 degrees incidence. Therefore, they are ideal for beam steering or reflection applications utilizing multiple laser sources. Coatings are provided by Ion Beam Sputtering (IBS) or Electron beam evaporation with/without Ion assistance coating techniques. High reflectivity greater than 99% dielectric coatings in the range of 0.19 - 20 µm are available. They are significantly better than that of metal coated mirrors, and increases system performance by minimizing energy loss. General Specifications of Dielectric Broadband Mirror: Material | BK7 Grade A optical glass, UV grade fused silica | Dimension Tolerance | +0.0/-0.2mm | Thickness Tolerance | ±0.2mm | Clear Aperture | >90% | Surface Quality | 60/40 sctrach and dig | Flatness | <λ/10@633nm per 25mm | Chamfer | Protected <0.5mmx45deg | Coating | Dielectric HR coating on one surface, Ravg>99.5% for random polarization, rear surface ground or inspection polished | Damage Threshold | >5J/cm2, 20ns, 20Hz, @1064nm | Standard Products of Dielectric Broadband Mirror: Part Number | Material | Diameter (mm) | Thickness (mm) | Wavelength (nm) | AOI (°) | BDM1203-350-400 | BK7 | 12.7 | 3.0 | 350-400 | 0-45 | BDM2506-350-400 | BK7 | 25.4 | 6.4 | 350-400 | 0-45 | BDM5006-350-400 | BK7 | 50.8 | 6.4 | 350-400 | 0-45 | BDM1203-400-750 | BK7 | 12.7 | 3.0 | 400-750 | 0-45 | BDM2506-400-750 | BK7 | 25.4 | 6.4 | 400-750 | 0-45 | BDM5006-400-750 | BK7 | 50.8 | 6.4 | 400-750 | 0-45 | BDM1203-750-1100 | BK7 | 12.7 | 3.0 | 750-1100 | 0-45 | BDM2506-750-1100 | BK7 | 25.4 | 6.4 | 750-1100 | 0-45 | BDM5006-750-1100 | BK7 | 50.8 | 6.4 | 750-1100 | 0-45 | BDM1203-1280-1600 | BK7 | 12.7 | 3.0 | 1280-1600 | 0-45 | BDM2506-1280-1600 | BK7 | 25.4 | 6.4 | 1280-1600 | 0-45 | BDM5006-1280-1600 | BK7 | 50.8 | 6.4 | 1280-1600 | 0-45 | Coating Graphs of Dielectric Broadband Mirror: 350-400nm Dielectric Broadband Mirror AOI0°  | 350-400nm Dielectric Broadband Mirror AOI45°  | 400-750nm Broadband Dielectric Mirror AOI0°  | 400-750nm Dielectric Broadband Mirror AOI45°  | 750-1100nm Broadband Dielectric Mirror AOI0°  | 750-1100nm Broadband Dielectric Mirror AOI45°  | 1280-1600nm Broadband Dielectric Mirror AOI0°  | 1280-1600nm Broadband Dielectric Mirror AOI45°  | |